Spring bed-bottom



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SPRING BED BOTTOM.

No. 270,949, Patented Ja,11.23-,1883;

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UNITED STATES PATENT OFFICE.

JOSEPH v. GRAY, oF RUsHvILLE, INDIANA.

SPRING BED-BOTTOM.

SPECIFICATION forming part of Letters Patent N0. 270,949, dated Ianuary23, 1883.

Application led November 27, 1882. (No model.)

.To all whom it may concern:

Be it known that I, JosEPH V. GRAY, a citizen of the United States,residing at Rushville, `in the county of Rush and State of Indiana, haveinvented a new and useful Spring Bed-Bottom, of 'which the following isa specication, reference beinghad to the accompanying drawings.

This invention relates to spring bed-bottoms, and has for its object toprovide a simple', inexpensive, and eicient arrangement and constructionof springs that will possess superior elasticity, strength, anddurability.

In the drawings, Figure l is a top View ot' a spring bed-bottom ot myimproved construction, only a section of the bottom being shown. Fig. 2is a side view of the section represented in Fig. 1. Fig. 3 is avertical sectional view on the line x x, Fig. l.

Referring to the drawings, A designates four springs, which constitute asection of my improved bed-bottoni, each of these springs being coiledconicallyat its upper portion, but having its lower portion or halfformed of coils ot' uniform diameter, as shown at U, by whichconstruction the durability and strength of the springs are enhanced.,and they are enabled to better accommodate and adapt themselves tovarying pressure. Each spring has also an enlarged coil, D, at itsbottom, that forms a base by which the springis secured to the slat E.The springs of the quadruple section herein shown are secured to theslats E in pairs, and each spring is braced and re-encured to the slatat its edge., and extend up and are secured to the main spring A,just

above its lower portion, of uniform coils C.

y These reent'orcin g and bracing springs FF are arranged in relation totheir respective main springs A-one inaJ line longitudinal to the pairof springs A A on the slat and the other in a line transverse thereto,as shown. The four springs A are united at their tops. by twocentrally-disposed coiled springs, G G, that extend diagonally from onespring of a pair to a spring of the other pair, and are intercoiled attheir centers H in such a manner as to cause the springs G G to have' anelongated-S contour, which increases their sup porting-surface andadmits of greater play.

B designates four small coiled springsthat are used to unite the springsA near the outer edge of the hereinshown rectangular section formed bythe'quadruple springs A.

The operation and advantages of my invention are obvious. y

The springs comprising this improved bedbottom are all completelyinterbraced, sothat they all assist in returningacompressed spring toits normal position; and this arrangement of springs provides a largebearing-surface for the mattress, while no ends of springs are exposedthat might tear or otherwise damage the bedding. To further obviatc anydamage to the bedding, the ends oi' the coiled springs F, G, and H', areturned inside their coil, as shown at I, after being bent round thesprings to which they are secured. The -ends I are thus inclosed bytheir own coils and cannot engage the bedding.

l claim as my invention- 1. In a spring bedbottom, the combination, withfour main springs arranged to form a rectangular section, of the centraldiagonallydisposed connecting coiled springs intercoiled at theircenter, so that each of the connectingsprings has an elongated-Scontour, which iucreases the supporting-surface and admits of greaterplay, as set forth.

2. In a spring bed-bottom, the combination, with the main springs, ofconnecting and bracing coiled springs, having their ends bent round themain springs and turned inside their own coils to prevent thetn fromengaging the bedding, as set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

JOSEPH VINCENT GRAY.

